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A cat’s eyesight is both better and worse than humans. It is better because cats can see in much dimmer light and they have a wider peripheral view. It’s worse because they don’t see color as well as humans do. Scientists believe grass appears red to cats.

Oof! Who wants red grass?

A cat’s heart beats nearly twice as fast as a human heart, at 110 to 140 beats a minute.

Nah, mine's faster, yo.

Isaac Newton invented the cat flap. Newton was experimenting in a pitch-black room. Spithead, one of his cats, kept opening the door and wrecking his experiment. The cat flap kept both Newton and Spithead happy.